html{
    margin:0px;
    padding:0px;
    height: 90%;
}
body{
    height: 100%;
}
a{
    text-decoration:none;
    color:#fff;
}
h1{
    margin:10px;
}

button#btn{
    color:#fff;
    background-color:#fb7299;
    border: none;
    border-radius:10px;
    width:70px;
    padding:3px;
}
button#btn:hover{
    padding:1px;
    color:#fb7299;
    background-color:#fff;
    border: 2px solid #e5e5e5;
    font-weight:bold;
}
body #mask{
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: -1;

    background-color: #fff;
}